兜兰属宽瓣亚属(广义)的补充研究

Additional notes on the subgenus Brachypetalum (s.l.) of Paphiopedilum

对新种小囊兜兰Paphiopedilumglobulosum与新变种扁球兜兰P .micranthumvar.oblatum作了描述与绘图。两者均为采自云南东南部的栽培植物 ,与硬叶兜兰P .micranthum近似。但小囊兜兰具有宽得多的叶 (宽 2 8～ 3 4cm) ,先端多少呈钩状、宽 1 1～ 1 2cm的唇瓣 ,以及与唇瓣囊口几乎同样大小的退化雄蕊 ,而扁球兜兰则叶宽 2 2～ 3cm ,唇瓣扁球形 ,囊深不超过 1cm ,可区别于硬叶兜兰。上述种类均属于宽瓣亚属 (广义 )。该亚属有 1 6个种产中国、越南或两地共有。

Two new orchid taxa, Paphiopedilum globulosum Z. J. Liu et S. C. Chen and Paphiopedilum micranthum Tang et Wang var. oblatum Z. J. Liu et J. Y. Zhang, are described and illustrated based on cultivated plants originating in southeastern Yunnan. Both of them are related to Paphiopedilum micranthum Tang et Wang, from which the former differs by having much broader leaves 2 8～3 4 cm wide, a somewhat hooked-tipped lip 1 1～1 2 cm wide, and a staminode almost as big as the mouth of the lip, and the latter by broader leaves 2 2～3 cm wide and an oblate lip at a depth of no more than 1 cm. They all belong to the subgenus Brachypetalum (s.l.). A key to 16 Chinese and Vietnamese species of this subgenus is provided.